Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

Did you review the daytime running lamps (DRL) operation and perform the necessary inspections?

Go to Step 2

Go to Exterior Lighting Systems Description and Operation

1. Turn ON the ignition, with the engine OFF.
2. Turn OFF the headlamps.
3. Set the park brake.

Does the DRL system operate normally?

Go to Testing for Electrical Intermittents in Wiring Systems

Go to Step 3

1. Turn OFF the ignition.
2. Disconnect the DRL control module connector.
3. Connect a test lamp between the park brake switch signal circuit and a battery positive voltage circuit.

Does the test lamp illuminate?

Go to Step 6

Go to Step 4

Test the park brake switch signal circuit of the park brake switch for a short to voltage, high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

Inspect for poor connections at the harness connector of the park brake switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

Inspect for poor connections at the harness connector of the DRL control module. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

Replace the park brake switch. Refer to Parking Brake Indicator Switch Replacement in Park Brake.

Did you complete the replacement?

Go to Step 9

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Replace the DRL control module. Refer to Daytime Running Lights (DRL) Control Module Replacement .

Did you complete the replacement?

Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3